All Figures

$\begin{figure} \par\includegraphics[width=17.5cm,clip]{5569fig1.ps} \end{figure}$ Figure 1: Overview of the H₂O, CO, 6.8 $\mu$ m and CO₂ ice bands ( ordered left to right) used to construct the ice map of the Oph-F core. The 3.08 $\mu$ m water ice bands shown on the left-most panel are ordered according to optical depth, for clarity, as indicated in the panel. In the remaining panels, the sources are ordered according to projected distance to the core center, with the source furthest from the center (IRS 46) at the top. No. 5-8 $\mu$ m spectrum is available for IRS 46. Note also that the 6.8 $\mu$ m band of IRS 42 is filled in by emission likely due to PAHs. All the spectra have been shifted vertically, for clarity.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{5569fig2.ps} \end{figure}$ Figure 2: The locations (triangles) of the sources used to construct the ice map plotted on the SCUBA 850 $\mu$ m map. The star symbol indicates the center of the core.
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In the text

$\begin{figure} \par\includegraphics[width=6.5cm,clip]{5569fig3.ps} \end{figure}$ Figure 3: Radial map of CO and CO₂ ices of the Oph-F core. Ice abundances relative to H₂O ice toward young stars are plotted as functions of projected distance to the center of the core as described in the text. The CO ice has been split into a "pure'' and "water-rich'' component following Pontoppidan et al. (2003).
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In the text

$\begin{figure} \par\includegraphics[width=6.9cm,clip]{5569fig4.ps} \end{figure}$ Figure 4: Observed and modeled CO ice abundance for Oph-F. The curve shows the simple freeze-out model for the best-fitting CO binding energy of dH/k=814 K. The "solid CO'' abundance is the sum of the pure CO, CO in water and the CO₂ ice excess abundances. This assumes that one CO molecule is used to produce each CO₂ molecule. The error bars indicate a 20% uncertainty.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{5569fig2.ps} \end{figure}$	Figure 2: The locations (triangles) of the sources used to construct the ice map plotted on the SCUBA 850 $\mu$ m map. The star symbol indicates the center of the core.
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$\begin{figure} \par\includegraphics[width=6.5cm,clip]{5569fig3.ps} \end{figure}$	Figure 3: Radial map of CO and CO₂ ices of the Oph-F core. Ice abundances relative to H₂O ice toward young stars are plotted as functions of projected distance to the center of the core as described in the text. The CO ice has been split into a "pure'' and "water-rich'' component following Pontoppidan et al. (2003).
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$\begin{figure} \par\includegraphics[width=6.9cm,clip]{5569fig4.ps} \end{figure}$	Figure 4: Observed and modeled CO ice abundance for Oph-F. The curve shows the simple freeze-out model for the best-fitting CO binding energy of dH/k=814 K. The "solid CO'' abundance is the sum of the pure CO, CO in water and the CO₂ ice excess abundances. This assumes that one CO molecule is used to produce each CO₂ molecule. The error bars indicate a 20% uncertainty.
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